1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.nodes.util; 26 27 import org.graalvm.compiler.core.common.NumUtil; 28 import org.graalvm.compiler.core.common.type.IntegerStamp; 29 import org.graalvm.compiler.core.common.type.StampFactory; 30 import org.graalvm.compiler.nodes.LogicNode; 31 import org.graalvm.compiler.nodes.NodeView; 32 import org.graalvm.compiler.nodes.ValueNode; 33 import org.graalvm.compiler.nodes.calc.IntegerBelowNode; 34 35 import jdk.vm.ci.code.CodeUtil; 36 37 public class UnsignedIntegerHelper extends IntegerHelper { 38 public UnsignedIntegerHelper(int bits) { 39 super(bits); 40 } 41 42 @Override 43 public long upperBound(IntegerStamp stamp) { 44 assert stamp.getBits() == bits; 45 return stamp.unsignedUpperBound(); 46 } 47 48 @Override 49 public long lowerBound(IntegerStamp stamp) { 50 assert stamp.getBits() == bits; 51 return stamp.unsignedLowerBound(); 52 } 53 54 @Override 55 protected int rawCompare(long a, long b) { 56 return Long.compareUnsigned(a, b); 57 } 58 59 @Override 60 protected long rawMin(long a, long b) { 61 return NumUtil.minUnsigned(a, b); 62 } 63 64 @Override 65 protected long rawMax(long a, long b) { 66 return NumUtil.maxUnsigned(a, b); 67 } 68 69 @Override 70 public long cast(long a) { 71 return CodeUtil.zeroExtend(a, bits); 72 } 73 74 @Override 75 public long minValue() { 76 return 0; 77 } 78 79 @Override 80 public long maxValue() { 81 return NumUtil.maxValueUnsigned(bits); 82 } 83 84 @Override 85 public IntegerStamp stamp(long min, long max) { 86 return StampFactory.forUnsignedInteger(bits, min, max); 87 } 88 89 @Override 90 public LogicNode createCompareNode(ValueNode x, ValueNode y, NodeView view) { 91 return IntegerBelowNode.create(x, y, view); 92 } 93 }